update LMDZORINCA_v6 configuration
1- now LMDZOR experiments are in New Physics
2- add clim_* LMDZOR experiments
3- now timestep is manage in gcm.def in relation with the atm physics choose
4- update value for GHG in config.def files
5- remove files not use anymore (PARAM/file_lmdz.xml PARAM/output.def)
6- add calcul_flux in inca.card / inca.def / inca.driver